Drainage-tube.



H. E. HUGHES.

DRAINAGE TUBE.

APPLICATION FILED APR. z, 1914.

Patented July .21, 1914.

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PATENT orme.

Unirn srafrns HARRY ELVERTON HUGHES,

`Olli"4 BALTIMORE, MARYLAND.

nRANAeE-TUBE.

' man body prior to the operation of embalming.

An object of the invention is to provide a drain tube wherein the usual plunger of such an apparatus is securely locked inprojected position within the tube duringthe process of inserting same into the body, thus overcoming a serious difiiculty which obtains in p p lriorly threaded nipple 17 upon which is the present known apparatuses of this type, in that the pressure exerted in forcing the tube through the tissues tends. to force the plunger back into the tube, and whensame is permitted to slip the tube end is exposed and, by reason of its comparatively sharp end cuts and rends the tissue instead of simply pushing same to either side, as is desired.

A further Obj ect of the invention is to provide suitable means, acting to lock the plunger, as in the first instance, and at thesame time simultaneously with the withdrawal of the plunger, after the artery has been properly tapped, automatically closes the tube against the outrushing ofblood, thus preventing the usual spill of blood upon such withdrawalof the plunger, andthe second spill of blood which follows during the attaching of the drawing hose to the free end of the drain tube.

The invention resides in a simple and compact construction and in its preferred embodiment is hereinafter more fully described, set forth in the appended claims, and illustrated in the accompanying drawings, in which drawings,

Figure 1 is a plan view of the apparatus. Fig. 2 is a longitudinal section of the apparatus showing the plunger in locked position. Fig. 3 is a partial longitudinal sectional view of the apparatus with the plunger removed and the locked plug closing the passage through the tube. Fig. 1 is a cross-section of the tube and plunger Showing the reduced.

Specification of Letters Patent. Patnggd July 2, 1914 Application filed April 2,

1914. serial No. 828,942.

ger showing the recess for the reception of i l the lock plug. i

In the drawing, in which like reference characters refer to similar parts in they several views, the usual tube, which is made preferably in three sizes or as many sizes as necessary open, at both ends, is designated p by the numeral 10, and is provided with lonj gitudinally extending slots 11 at its forward end.- The rear end of the tube 10 is preferf ably secured in the extension 12 of the coupling 13 which is provided with a second cxtension 14 adapted to receive ashorter tube 115 havingits outer end" terminating in an jenlargcment or head 16 adapted to retain ;the attached end of a` drawing hose (not shown).

The coupling 13 is formed with an eXtebore of the nipple 17 is a snugly fitted lock y plug 22 carried by the stem 23 which is passed through the reduced bore 20 of the casing 18. A coiledspring 211.surrounding` the stern 23 is retained within the vbore 19 and acts upon the lock plug 22 tending to force same downward upon the seat 25 formed in the bottom wall ofthe coupling 13. Located within the bore 19 is a metal washer 31 contacting a compressible washer or other suitable packing material 32 and adapted to force the same firmly against the end wall of the bore 19 and the stem 23 under the tension of the spring 24; to prevent leakageof any of the fluid which might fill the bore. The outer end of the stem k23 is provided with aknurled handle 26 to facilitate the operation of the lock plug. A pin.

movement of the plug 22 to contact its seat ioy 25 to close the passage through the tube. A plunger 28, of a diameter insuring a snug sliding fit with the tube 10, is provided, and is of length slightly exceeding the combined length of the tube 10, coupling 18 and tube 15, to permit its forward end, which is preferably rounded as illustrated, but may be pointed if desired,'to project beyond the forward end of the tube 10. The rear end of the plunger 28 is provided with the usual finger hold 29 for the proper manipulation of the V` saine. A recess 30 is formed upon the pluni sionfof the spring 24 until the pin 27 is free .y from the slot 21, the stem is then turned to bring the pin out of alinement with the slot and is allowed to rest upon the upper edge of the casing 18; The plunger isnow passed i ythrough the tube for vits length andthe stem i. 23 is turned until the pin`27 again engages the slot 21 permitting the spring 2l toforce the lock plug 22 into engagement with theI recess 30. The apparatus is now ready to be forced yinto the bodyas usual, andwhen proper connection with the desired artery is established, the finger hold 29y is grasped and aturning movement is imparted thereto i to disengage the recess 30 from the lock plug 22 after ywhich. the plunger is withdrawn.

, Simultaneously with the passing of the forward end of the plunger 28 -beyond the lock plug-22 and into the extension 14k the spring 24forces the lock plug 22 quickly into engagement with the seat 25 vthereby closing the passage through the tube and prevent ing the eXit ofthe rush of blood which follows. A suitable drawing hose is now atf tached to the head 16 of the short tube 15 and the lock plug 22 is withdrawn untilthe pin 27 is again out of engagement with the slot 21 and by imparting a slight turn to the stem 23 the pinengagesthe` upper edge of the easing 18 and serves to retain the plug in this'position until it is desired to cut olf the flow of blood, whether, or not the opera-r l tion be entirely completed.

l Should it be desired to lreinsert the plunger at any time dui-ing the operation, as in event of clogging with eoagulated blood, the lock plug maybe released to close the passage, and upon detaching the drawing hose the plunger is pushed into lthetube sufliciently to prevent a flow therefrom when the lock plunger is again raised.

While the invention has been particularly described askadapted for embalining it will, of course, be understood that it may be used asacatheter for any kind of drawing purpose to which such apparatuses are applicable.

l/Vhat I claimandr desire lto secure 'by Letters Patent is,-` Y

1. In a catheter for draining and embalining purposes, the combination with a drainage tube, of a plunger movable in said tube,

and means for closing the passage through said tube prio-r to the vcomplete withdrawal of the plunger therefrom.

2. In a catheter for draining and embalm'- ing purposes, the combination with a drainage tube, of a plunger movable in said tube, and means for locking said lplungerin operative position within said tube, said means withdrawn therefrom.

L In a catheter for draining and embalming purposes, the combination with aV drainplunger in operative` position, said means automatically closing the passage through said tube simultaneously with the with-` drawal of said plunger from the latter.

v open at both ends, of a plungermovable in said tube adapted to be withdrawn entirely from the tube to permit unrestricted passage therethrough,r and locking means normally holdingsaid plunger in operative position, said means automatically closing the passage through the tube simultaneously with they withdrawal of said plunger from the latter.

6. In a `catheter for draining and embalming purposes, the kcombination witha tube open at both ends,of a plunger movable in said tube, said plunger being provided with a recess, and locking means engaging said recess to hold said plunger in operative'position, said means automaticallyclosingthe passage through Vthe tube simultaneously with the withdrawal of said plunger the latter.

7. In a catheter for draining and embalming purposes, the combinationwith a-drainage tube, of a plunger movable in said tube, said plunger being formed with an eccentric reduced portion to lprovidev a recess, 'and locking means engaging the-recess to hold said plunger in operative position, said plunger being released from said locking gage tube, of a plungermovable in' saidtube, and locking means normallyholding said vfrom meansby a. turning movement imparted to the plunger within the tube, said means automatically closing the passage through the tube simultaneously with the withdrawal of said plunger from said tube.

- 8. In a. catheter for draining and embalm' ing purposes, the combination with a drainage tube, of a plunger movable in said tube and provided with a. recess, locking means engaging said recess to hold ythe plunger in operative position, said plunger being released from said locking means by a turning movement of the former within the tube, said means automatically closing the passage through the tube simultaneously with the withdrawal of the plunger from said tube, and means for holding said locking means clear of the passage through the tube.

9. In a catheter for draining and embalming purposes, the combination with a. drainage tube, of a casing' interposed between the ends of the tube, a plunger movable in said tube and provided with a recess, and looking means carried bythe casing andl engaging said recess to normally hold the plunger in operative position, said means automatically closing the passage through the tube simultaneously with the withdrawal of the plunger from said tube, and means for holding said locking means clear of said passage during the drawing operat-ion.

10. In a catheter for draining and embalming purposes, the ycombinationwith a drainage tube formed in two sections, of al coupling connecting the sections and provided with a nipple at right angles to the tube, a casing carried by said nipple, a lock plug operable within the nipple and casing, means for actuating the lock plug, a plunger movable in said tube and provided with a recess adapted to be engaged by said lock plug, said coupling being provided with a seat adapted to receive the lock plug when same is released from engagement with said plunger, and means for holding said lock plig free from the passage through said tu e.

11. In a catheter for draining and embalming purposes, the combination with a drainage tube, of a plunger movable in said tube and having a cam-like recess, and locking means coperative with said recess to retain said plunger in operative position within said tube, said locking means being released from said recess by a partial turning of said plunger.

l2. In a catheter for draining and em balming purposes, the combination with a drainage tube, of a plunger' movable in said tube and having a cam-like recess, and sprin04 actuated` locking means coperative with sai recess to retain said plunger in operative position within said tube, said locking means being released from said recess by a partial turning of said plunger and adapted to close the passage through said tube when said plunger has been partially withdrawn therefrom.

13. In a catheter for draining and embalming purposes, the combination with a ldrainage tube, of a plunger movable in said Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

